• Alisma Linnaeus, 1753
• Alisma brevipes Greene accepted as Alisma triviale Pursh
• Alisma geyeri Torr. accepted as Alisma gramineum Lej.
• Alisma gramineum Lej.
• Alisma lanceolatum Gray accepted as Alisma gramineum Lej.
• Alisma lanceolatum Withering
• Alisma natans Linnaeus accepted as Luronium natans (L.) Raf.
• Alisma parnassifolia Bassi Ex Linnaeus accepted as Caldesia parnassifolia (L.) Parl.
• Alisma plantagoaquatica
• Alisma plantago-aquatica Linnaeus
• Alisma ranunculoides Linnaeus accepted as Baldellia ranunculoides (L.) Parl.
• Alisma rostrata Nutt. accepted as Echinodorus berteroi (Spreng.) Fassett
• Alisma subcordatum Raf.
• Alisma triviale Pursh
• Alisma wahlenbergii (Holmb.) Juz.
• Alismacites G. Saporta, 1862 † (uncertain)
• Alismadon Fleming, 1828 accepted as Alasmidonta Say, 1818
• Alismaphyllites Knowlton, 1917 † (uncertain)
• Alismaphyllum E.W. Berry, 1911 † (uncertain)
• Alismataceae Ventenat, 1799
• Alismataceaepites B. Biswas, 1962 †
• Alismatales
• Alismatales (awaiting allocation) (temporary name)
• Alismaticarpum M.E. Collinson, 1983 † (uncertain)